TEOST™

Thermo-oxidation Engine Oil Simulation Test

The TEOST 33C test simulates the effect of engine operating conditions on the oxidation and deposit-forming tendencies of engine oils, especially in the high-temperature Turbocharger area. The TEOST MHT™ test simulates similar effects and conditions found in the ring belt and piston ring areas of the engine.

Oil samples treated with catalysts are pumped over a heated 33C Depositor Rod or a coiled MHT Depositor Rod on which deposits form. The weight of the Depositor Rod after the test is subtracted from its pre-test weight and added to the particulate weight collected by filtering the oil remaining. The results are reported in milligrams.

Mass Flow Controllers, utilized for both TEOST™ 33C and MHT™ tests, introduce various components to the test oil such as reactive gases and air. The MHT™ Mass Flow Controller solely operates with the D7097 test, while the 33C/Dual Mass Flow Controller operates with both ASTM D6335 & D7097 tests.